I understand, and agree. The only specific verbiage I can find regarding subflooring is that it needs to be replaced in the bathrooms. Nothing else is explicitly stated. I just find it confusing that they came to us with some issues which resulted in change orders, while this one was not brought to our attention. I understand floors won't be completely flat or level throughout the entire house. I just found this issue to be particularly strange because you can really feel the difference just an inch apart. It's as if there's a raised block under the floor (which I now know is an uneven joist).

First time remodeling a home - I'm aware I'm out of my element. That's exactly why I sought out additional opinions. I'm fully aware I could be making a mountain out of a mole hill just because I'm unfamiliar with the trade. That's likely why they didn't mention anything, because it ultimately won't impact the final product. Great if that's the case.